JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-1.12.3.min.js"></script>
<ul>
<li class="button">
  Item
  <ul>
    <li>Sub Item</li>
  </ul>
</li>
<li class="button">
 Item
  <ul>
    <li>Sub Item 2</li>
  </ul>
</li>
</ul>

CSS

ul, li {
  margin: 0;
  padding: 0;
}

li {
  list-style-type: none;
}

li li {
  position: relative;
  left: -10px;
  opacity: 0;
  
  -webkit-transition: all 0.2s ease;
  -moz-transition: all 0.2s ease;
  -ms-transition: all 0.2s ease;
  -o-transition: all 0.2s ease;
  transition: all 0.2s ease;
}

li.active {
  opacity: 1;
  left: 0;
}

JavaScript

$(document).ready(function(){
	$(".button").on("click", function(e){
  	$(e.target).find("li").toggleClass("active");
  })
});